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November 24, 2009
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Reflux Laryngitis

Medical Author: John P. Cunha, DO, FACOEP
Medical Editor: Jay W. Marks, MD

Why does reflux laryngitis occur?

Reflux is caused by weakness in the muscle at the junction of the esophagus with the stomach. Normally, this muscular valve, or sphincter, functions to keep food and stomach acid from moving upward from the stomach to the esophagus and larynx. This valve opens to allow food into the stomach and closes to keep the stomach's contents from coming back up. The backward movement of stomach contents (gastric contents) up into the esophagus is referred to as gastroesophageal reflux.

Additionally, any increase in abdominal pressure (such as obesity), which can push acid back from the stomach up the esophagus, or a  patient with a hiatal hernia, will have an increased risk for reflux. When it causes symptoms, it is referred to as gastroesophageal reflux disease (or GERD). When the acid backs up into the voice box (larynx), the condition is referred to as reflux laryngitis.

Stomach acid can cause irritation of the lining of the esophagus, larynx, and throat. This can lead to:

Rarely, reflux can lead to cancers of the esophagus or larynx.



Next: What are the typical symptoms of reflux laryngitis? »

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Reflux Laryngitis

What is obesity?

The definition of obesity varies depending on what one reads, but in general, it is a chronic condition defined by an excess amount body fat. A certain amount of body fat is necessary for storing energy, heat insulation, shock absorption, and other functions. The normal amount of body fat (expressed as percentage of body fat) is between 25%-30% in women and 18%-23% in men. Women with over 30% body fat and men with over 25% body fat are considered obese.

The calculation of body mass index (BMI) has also been used in the definition of obesity. The body mass index (BMI) equals a person's weight in kilograms (kg) divided by their height in meters (m) squared. Since BMI describes body weight relative to height, it is strongly correlated with total body fat content in adults. "Obesity" is defined as a BMI of 30 and above.

How common is obesity?

Obesity has reached epidemic proportions in the United States. One i...

Read the Obesity article »










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